Typewriting machine



Rfw. UHLIG..

TYPEWRITING MACHINE. I APPUCATION FILED AUG. 1, I917- 1,41 (),854Patented Mar. 28, 1922.

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TYPEWRITING MACHINE. APPLICATION F-ILED Aue.1, 1917.

Patented Mar. 28, 1922:.

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RICHARD w. UHLIG, or- ARLINGTON, NEW JERSEY, ASsreNoRTo ALLE -TYPE-WRITER COMPANY, or ALLENTOWN, PENNSYLVANIA, A CORPQRATION or.

PENNSYLVANIA.

The iii-[tom it concern: Be it known that I, RiorrAnD a citizen of theUnited States and a resident of Arlington, in the county of Hudson andState of New Jersey, have invented certain newjand useful Improvementsin Typewritspecification.

This invention relates to typewriting maing Machines, of whichthefollowing is a i chines, and particularly to means to impart retractivmovement to a platen carriage letter space distances, and which iscommonly termed baclrspacing, and it is the object of the invention toprovide improved mechani'sm of this character which is simple, cheap andnovel in construction and eflicient in operation.

In carrying out the invention I provide the platen carriage,no'rmallyurged or moved in one direction under the influence of a spring, with arackto extend longitudinally thereof and with which rack a pinionmeshes, said pinion'being rotatable with a ratchet Wheel of anescapement mechanism operable upon each impression making oper ationthrough spacing and detent dogs to vfeed the carriage letter spacedistances, and

rotatable therewith and thereby retract the platen carriage letter spacedistances.

, In the drawings accompanying and form ing a part of this specificationFigure 1 IS a sectional side elevation ofa typewriting machine with anembodlment of my invention.

a Figure 2 is a planview of the escapement mechanism and my improvedmeans to impart retrograde movement to the ratchet wheel of theescapement mechanism, the

5 parts being shown in normal inoperative position. a r

Figure 3 is a new simllar' to Figure 2 but showing the position of theparts as reverse rotary movement is imparted to the ratchet wheel of theescapement mechanism. t Figure 4 is a similar view to Figure 2 butratchet wheel of the, escapement mechanism one tooth space; and

:VV. UHLie,

chine.

TYPEWRI'TING MACHINE.

. Figlireb i a detail of pawl and ratchet sir-arts Parana easi stSpecification or Letters Patent. Patented MQ QZS, 1 922. Applicationfiled August 1, 1917. Serial No. 183566;

mechanism to impart IEVGI'SBVDIOVBIIIGI'IC to a the escapement wheel. 7r 1 Similar characters of reference designate like parts throughout thedifi'erent views of the drawings, v i

I have shown an mbodiment of my invention in connection with atypewriting machine in which impressiondevices carried by typebars 6pivotally supported in a segment 7 strike rearwardly against a platen 8rotai tably supported in a to and fro movable car rlage 9, said carriagebeing normally urged or moved in one direction by a spring 10 one 1 endof whlch 1s connected to the carnage and the other end to a fined partof themapressing key levers 11 pivotally supported, as at 12,intransverse slots in a cross bar 13 The typebars are actuated by de- 1extending transversely ofthe framework F, and connected to the typebarsbylin'ks 14;; Amok 15 pivotally carried by and extending longitudinallyofthe ,carria e meshes with a pinion 16 fixedito a shaft 1 supported torotate ona vertical axis in brackets 18, 19 fined to and extendingforward from the back of the framework, and through which a rack andpinion the carriageis fed or advanced intermittently step by stepuponthe actuation of the typebars. The pinion 16 is rotated step by step tofeed or advance the platen carriage through escapement mecha-i 7 .nismcomprising an escapement wheel 21 fixed to and rotatable with the shaft17 and pinion 16 and is advanced or rotated in the direction of thearrow (Figures 2,8 and 4:) through the influence of the carriag springby afixed' detent dog 22 and a pivoted spacing dog 23 mounted on acarrier24, Said carrier beingloose on a rock shaft 25 and normallymaintained in engagement with a stop 25' by aspring 23". The spacing dog23 is mounted upon the carrier through a support 26 pivoted upon'thecarrier and'to which the dog 23 is pivotally connected, as at 27, to

have movement with thesupport and independent thereof for apurposeherelnafter described. Movement is imparted to the dog carrier 24to actuate the feed'dogs through the rock 7 Shaft 25 by a universalbar29 extending transversely of the framework and carried 1 the'shaft 25causing a finger 34; fixed thereto "tia-lposition to be engaged ,by thetooth, 4:7 I I of the eseape nent wheel when the slide 39 22 intoengagement .with" the tooth of the engages over the projecting ends 31of the key levers 11 and upon the depression of said lovers toactua-tegthe typebars (.or the actuatlon word; spacing bar not shown)theuniversal bar is lifted to the dotted line pos tion shown in Figure 1thereby'rocking and engaging below the dog carrier 2% to lift the latterthereby throwing the fined, dog

escapeme-nt wheel engaged by. the; spacing dog 23 and thenjthelatter'olit'o fengagfi' ment with said tooth, the same being .Inoyed toposition to be engaged'by the next succeeding tooth 0]": the escapeinentwheel by a spring 23" through its support 26, ,When'the finger key leveris released the Liniyersal bar isretjurned by'its spring 35 and thedogca-rA rier by the spring 23', thereby advancing the carriage a letterspace distance To back space the platen carriage against the influenceof ts spring 10 pawl and ratchet mechanlsm 1s PIQVlClGCl to mpartrotative'niovement to the'pinion' lG and con- 'fnected escapeinentwheel21 and by such re- 'versefmovernent of the escaper'nent wheelcounteractivemovement to the feeding dogs, comprising a ratchetfwheel 38fixed to the shaft 17 below and juxtaposed to theescape- Inent wheel 21said wheel preferably being of less diameter than the escapeinent wheelbut having the same number of teeth. A

slide 39 has a part 40 at the forwardend extending through and slidablyengaging in the forward end of the framework and pro -"V1dedW 1th' afinger'plece at the PTOjGOtIHgend, with the oppositeend bentat rightangles, as shown at 41, sli'dably. engaging and guided between theratchet'wheel38 and the shaft support .34: with a slot 42 thereinthrough which the shaft li'extends to pen, 'mit of backward and forwardmoyementof the slide; {The slidepivotally carries apawl or dog 43 toeoeoperate with the "ratchet wheel 38 whenrthe' slide'is movedbaclzwardto rotate said wheel and the shaft 17 with "the connected escapenientwheel and pinion 16 in' direction reverse to that indicated bythe'arrow.The pawl is causedto-engage with atooth of the ratchet wheel a spring 44said spring normallymaintainrg the pawl in position with when" thereofsupporting-across bar 13 (Figures 1'; 2).

During the initial backward'moyen ient of the slide with theescapementwheel arrested by a t0oth46 thereof engaging with'the spacingdog 23, as shown in Figure 2, as the pawl'43gengages'with tooth o'f the"ratchet iwheel" 38;;fsaid letter when is rotated disclaim rides over thetooth; 47 ("Figure 3);" to assume a position in the: toothWspace} at the'rightoi 's'aid tooth as viewed from Figures 2,

3 and 41- when the dog is returned to its inii's-i'elea'sed 'and'retracted by its spring 45, and the parts areagaln in positiontobe attuated through the operation of'the', universal bar 29' upontheactuation of the key levers or wordspace bar to ladil tl iceftheriageletter space distances. 'It willfbeobtance'equail tofa letterspacey r a ;Havingftl1us described my invention, fI '1 Inia typewritingmachinethegcollnbination with theiframework and'a longitudi- 'yiousthatduring the retrograde movement inally movable platen carriage includinga v.

rack extending longitudinally thereof that spring to urge the carriageino'ne direction, of a ertical shaft; a pinion fixedto the upper end of;said shaft meshing with'the carriage rack; an escaperne nz"wheelo'nsaid. shaft; dogs co-operatlng with the esc'apeinent wheel and operabletoadvance the car-- 'riage letter space distances; at ratchet wlieelfixed to the lower end of said shaftjagsli'de ,inountedsubstantiallyImidway of the H13- cliine and extending from the front to the rear-"andhaving longitudinal to "and fro movement, saic'lslide having a slotinthe rear portion for the passage ofthe 's'haftto guidethe slideinitsmoyeinentya pawl carri d at the rear end of said slide toco- Ioperate with j thefratehet wheel a spring to normally' urge andniaintain the slide inits forwardp'osltion and thereby thepawljout ofengagement wlth the ratchet wheelyand wheel touadvance the same onetooth space P9 f h rearward, movement of the glid fort-he purposespeclfied. .7

' 2. In aatypewriting Ina-=3hine, tl e "eombination with alongitudinallymoyableear riage 'andnormally "urged in" one "direction,

of escapement' mechanism including an es-H capeinent wheel anddogs toco-operatetherewith" to feed the car'riag'eletter space disescapement'wheel a longitudinally reciprocable slide extending from the front tothe rear of the machineyajspring to normally urge the slide forward ;apawl plVOtflllYiGflI- said pawl adapted to engagea tooth'of saidjtances; a ratchetwheel rotatable with the ried at the rear end of theslide having a ip'allet to'e'ngage a tooth of the ratchet vyfvheel whenthe slideis moved re'ar'ward torotate '130 i the ratchet wheel aridthereby the escape ment wheel in reverse direction to retract thecarriage; a stop carried by the slide; and a spring to maintain the pawlin engagement with the stop and in position to engage a tooth of theratchet wheel when the slide is moved rearward and adapted to permit thepawl pallet to ride over a tooth of the ratchet Wheel when the slide ismoved forward by its spring. Signed at New York city, in the county ofNew, York, and Stateof New York this third day of July, 1917.

' RICHARD W. UHLIG.

